BCN3D++ Dual Bowden Extrusor

##BCN3D++ Dual Bowden extruder
##Better, Faster, Bigger
This mod is based on the great work by altrome (http://www.thingiverse.com/thing:406531) and my own Single Extruder Bowden (http://www.thingiverse.com/thing:419278).
Aiming to get a better printing quality, faster printing, and bigger printer area I have redesigned a bit the original dual BCN3D+ head as follows, to turn it into BCN3D++ wich can now print **X=245,Y=195,Z=240**.
check the single Bowden version (http://www.thingiverse.